摘要
通过AMESim软件建立了桩-土系统的动力学数值仿真模型,研究了振动沉桩过程中激振力频率和土质条件对桩-土系统的振动摩擦特性的影响.对比不同参数下沉桩位移、桩端阻力和桩侧摩擦力的变化曲线,得出激振力频率以及土质条件对沉桩效果的影响规律:激振频率越高,沉桩振幅越小;土的黏聚力越大,沉桩阻力初始值越大;土容重越大,沉桩阻力变化速率越快.从而获得摩擦力较小的激振频率区间,以提高土木建筑施工中桩-土系统的工作效率.
The numerical simulation model of pile-soil system was established in AMESim, and the effect of excitation frequency and soil condition on the vibration friction characteristics in the process of pile driving was studied. The effects of pile driving were obtained by comparing the curves of sinking pile displacement, pile tip resistance and side frictional resistance versus different parameters. The results reveal that the amplitude of pile driving decreases with increasing the vibration frequency. The initial pile resistance increases with improving the soil cohesion. And with bigger soil volume weight, the change rate of pile resistance increases. Thus, the vibration frequency interval with less friction can be obtained, and improving the efficiency of pile-soil system in civil building.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第5期683-686,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(51275079)
中央高校基本科研业务费专项资金资助项目(N110403009)
关键词
桩-土系统
振动利用
非线性振动
振动摩擦
pile-soil system
vibration utilization
nonlinear vibration
vibration friction
